Lamp shade for use with incandescent electric lamps



March 10. 1925.

J. MERSING LAMP SHADE FOR USE WITH INCANDESCENT ELECTRIC LAMPS Filed De. 12, 1923 5 Sheets-Sheet 1 Hul -U March 10, 1925.

J. MERSING LAMP SHADE FOR USE WITH INCANDESCENT ELECTRIC LAMPS 1925 s Shets-Sheet 2 Filed Dec. 12

March 10. 1925.

- J. MERSING LAMP saws FOR usm WITH INCANDESCENT ELECTRIG'LAMPS,

Filed D66. 12 1923 5 Sheets-Sheet :5

March 10. 1925. 1,529,266

J. MERSING LAMP SHADE FOR USE WITH INCANDESCENT ELECTRIC LAMPS Filed Dec. 2. 1923 5 Sheets-Sheet 4 77g //7 VE/Z 20w March 10. 1925. I

' J. MERSING LAMP smwm FOR usz: WITH mcmnsscsmr ELECTRIC LAMPS Filed De. 12. 1923 5 Sheets-Sheet 5 port seen at right angles to Fig.

Patented Mar. 10, 1925 UNITED STATES Pzsxrlarrf OFFICE. v

JOSEF MERSING, OF ZURICH, SWITZERLAND.

LAMP SHADE FOR USE WI'IH IN'CA'NDESCENT ELECTRIG LAFIPS.

' Application filed Decembef12, 1923. Serial No. 680,181.

To all whom it may, concern:

Be it known that I, J osnr Mnnsmo, a citi zen of the Swiss Republic, residing at Zurich, Switzerland, have invented certain Improvements in Lamp Shades for Use with Incandescent Electric Lamps, of which the following is a specification.

This invention relates to'a shade for elec tric incandescent lamps of the kind composed of two hingedly connected vitreous globe-parts and provided with means for transmitting only diflused and reflected With this object in view I connect the two arts of the shade to their metal mounts y means of resilient tongues stamped out 'of the metal, and I connect the shade to its hood carrier by means-of a slotted ring which is adjustable on radial screws for clamping the shade to'the hood.

Fig. 1 of the accompanying drawings represents a view oftheglobe according to one construction, partly in section and partly in elevation. I Y

Figs. 2 and '3 are sectional views on a larger scale showing the mode of connecting the globe elements, and

Fig. 4 is a cross-section of Fig. 3.

M Fig. 5 is a view of a modified detail.

Fig. 6 is a view of the lamp support,

. Fig. :7, a sectional view of part of the sup- 6. Fig. 8, cross-sectional detai viewof the part shown in Fig. 7, and

Fig. 9, a plan of the lamp support.

Fig. 10 is a view of an arrangement for indirect illumination, and J Fi 11, a view showing the device com-. bine with an illuminated sign.

The lamp globe is preferably com osed of two parts which are connected so t at they can be opened out for the admission of the lamp.

- about 45 with the perpendicular. The incandescent lamp 5, ,which is of the half-watt type, is arranged with its filament 5 in the median plane A-Bof the conical surface In the construction according to 'Figs. 1 to 4, the globe has an upper, hell- 2. 3 Thus the horizontal light rays emitted by the lamp 5 will be reflected by this surface in, a substantially vertical direction,

either entirely or partly; depending on whether the surface is opaque or translucent.) If total reflection is desired, the surface 2 is preferably silvered j The lower part of the globe closes the mouth of the bell 2. It has a central translucent portion 3 which issubstantiallyboncentric with the filament, 5 and which diffuses the light emitted direct by the latter. The portion 3 is surrounded by a transparent ring 3 through which the reflected rays from the surface 2 are projected towards the surface to be illuminated. Thus, maximum lighting effect will'be obtained while the lamp filament is shaded so as not tobe directly in view.

The manner of connecting the two parts of the globe is illustrated in Fig. 2. The

hell 2 is fitted with a metalrim 4 which is suspendedon a beaded flange 9 and connected to the latter by means of resilient tongues 12 which are bent round the bead after the elements have been assembled. The lower part of the globe is mounted in a ring 6 which is hin'ged at 7 to the rim 4 and which is connected to the globe part by means of resilient tongues 11 applied'to the head 10.

One or more screw clamps 8, which are connected to the rim 4, are used for holding the ring 6 in closed position. The parts can easil be turned open about the hinge when the amp 5 requires attention or renewal.

-' The tongues 11 and 12 are cut out'of metal strips which are riveted o'r solderedto their to the expansion of the vitreous elements 2 and 3, a breakage of the latter by the changes in the temperature is effectively obviated- The rim 4 is provided with ventilating apertures 13 which may be covered.

with sects.

The globe is fitted in a holder composed of a 'hood 1 which is also provided with gauze in order to exclude dustand ingauze-covered air vents 27 "so that the air terminates in a conical rim .17. Inside the.

support. As these tongues can yield easily hood a ringx 1 formed 14 is arranged which is also wit two cylindrical stepped portions 21 and a conical'ri-m. 23. The hood 1 is fitted with radially adjustable *screws- 19 which are held inbosses 18 connected to the portion 15. The corresponding portion 20 of the ring 14 is formed with slots for engagement with the screws 19.

The slots are preferably tapered so as to present a wide inlet to the-screws. At all .events the upper edges" of the slots are 1nclined so thatv a rotary adjustment of the ring, and this ring, which rests by means'of said edges on the screws, is'accompan1ed by an axial displacement of the ring relative to the hood.

There is a flange 22 at the upper edge of the fl ge is formed with notches 26 above, the highest parts of'the slots 25.

The hell 2 is, c amped between the rims 17 and 23. In assembling the elements, the bell 2 is suspended on the rim 23 while the ring 14 is insertedinto the hood. To allow the flange 22 to pass the bosses 18,'the hood must be turned until the hoses l8 register with. the notches 26. When the ring is pushed home, therefore, the slots 25 W1ll be in a position to receive the screws 19. There-1" upon the ring is turned on the screws until the bell 2 is grip edby the rims 17 and 23 with suificient rmness. The ring 14 is Y fitted with internal lugs 24 whereby its r0 tion.

- tive to the reflector 2*,- the lamp holder 39 tary displacement relative to the hoodican be easily efi'ected. As the rims exert a uniform and yielding pressureon the hell 2,

the latter will not be liable to crack during assemblage or during use, as when held direct by the fastening'screws in the usual manner.- The upper edges of the slots 25- may be serrated as shown in Fi 5, the better to retain the ring 14 in a justed posi-' To allow an adjustment of the lamp 5 relais fitted in a bridge 29 which is sli'dably held on the limbs, of a U-shaped, vertical shackle 28 suspended from the top of the hood 1. The shackle is resilient and is constrained v by the bridge 29 so that the latter wilLbe retained by spring-action in any position of the limbs to whic .it may be adjusted.

I If a dim light should be required from two lamps connected in series, a yoke 31 (Fig.7) is connected to the bridge 29'for;

holding the twfo lamps 36. The holders 35 for these lamps are connected to the rightangled lower ends of two slides 32 which are guided longitudinally in the vertical,- channelled members of the yoke 31. The,

slides are secured to the yoke by means'ot/ screws whichass through" longitudinal slots" 34 in the sli es. By-this arrangement 'all the holders can- -be'adjusted so .that a lamp inserted in either, will be in its proper 1 position relative to the reflector 2 *VVhen partly direct and partly indirect lighting is required, the arrangement shown in Fig. 10 may be resorted to. In this case the globe is composed of two bell-shaped tion of the lower bell is translucent so as to admit diffused light direct. The bell 37 is transparent so as to admit all the direct or reflected light to the ceiling or to the reflector 39. The center portion of the lower bell a can also be transparent if the lower part of gthe lamp bulb 5 is frosted. The advantage of using the reflector 39 is that its inclination can be regulated for throwing the light .in a definite direction. 'If the same kind of lamp is always used, the arrangement for adjustin can be d spensed with.

the position of the lamp holder The rim which connects the two globe parts maybe utilized for exhibiting illuminated signs, as shown in Fig. 11. For this purpose, the rim may be composed of two .parts and 4 which are distanced byv means 'of stays 40. The transparency 41 is arran d between the two parts of the rim behind. t e stays 40. It may either bemade of glass or some opaque material which is suitably per.-

for ated.

The device may be subjected to further modifications within the scope of the invention. For instance the globe-may be made in a single piece, and it "may be supported on a pedestal instead ofbeing suspended as shown. 3 i

A lamp shade of the character described, comprising a globe divided into an upper and a lower part, two hingedly connected. metal mount having resilient tongues and being connected to said globe parts, one to each, by the bending over of said tongues, a globe holder comprising ahood, a slotted ring nested within said hood, said hood and ring bein provided with conical rims between which the globe "can be clamped, and

radial screws connected to the hood so that.

theycan-be' engaged in the slots of said ring" for holding the artstogether, the slots be-I inginclined sot at the rims can be clamped to the globe by a. relative rotary Ilisplace- I ment of .the holder parts. JOSEFMERSING. 

